Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 320	$ 493
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	290	256
Amortization of Nuclear Fuel	50	43
Provision for Deferred Income Taxes (Other than Leases) and ITC	(5)	12
Non-Cash Employee Benefit Plan Costs	61	68
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	(6)	140
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	165	0
Deferred Storm Costs	(46)	4
Net Change in Regulatory Assets and Liabilities	80	(26)
Cost of Removal	(24)	(20)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(24)	(15)
Net Change in Certain Current Assets and Liabilities	207	279
Net Change in Certain Current Assets and Liabilities:
Employee Benefit Plan Funding and Related Payments	(192)	(154)
Other	1	8
Net Cash Provided By (Used In) Operating Activities	877	1,088
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(724)	(687)
Proceeds from Sale of Available-for-Sale Securities	258	499
Investments in Available-for-Sale Securities	(271)	(511)
Other	4	(7)
Net Cash Provided By (Used In) Investing Activities	(733)	(706)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(98)	29
Issuance of Long-Term Debt	400	0
Redemption of Long-Term Debt	(201)	(115)
Cash Dividend Paid on Common Stock	(182)	(179)
Other	(22)	(20)
Net Cash Provided By (Used In) Financing Activities	(103)	(285)
Net Increase (Decrease) In Cash and Cash Equivalents	41	97
Cash and Cash Equivalents at Beginning of Period	379	834
Cash and Cash Equivalents at End of Period	420	931
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	3	3
Interest Paid, Net of Amounts Capitalized	82	84
Accrued Property, Plant and Equipment Expenditures	265	202
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	137	253
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	64	57
Amortization of Nuclear Fuel	50	43
Provision for Deferred Income Taxes (Other than Leases) and ITC	(33)	101
Non-Cash Employee Benefit Plan Costs	17	18
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	165	0
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(24)	(15)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	259	188
Margin Deposit	(117)	(34)
Accounts Receivable	3	47
Accounts Payable	(67)	(11)
Accounts Receivable/Payable-Affiliated Companies, net	121	145
Accrued Interest Payable	15	17
Other Current Assets and Liabilities	22	(39)
Employee Benefit Plan Funding and Related Payments	(45)	(38)
Other	5	(1)
Net Cash Provided By (Used In) Operating Activities	572	731
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(143)	(237)
Proceeds from Sale of Available-for-Sale Securities	244	375
Investments in Available-for-Sale Securities	(256)	(385)
Short-Term Loan-Affiliated Company, net	(174)	(128)
Other	8	10
Net Cash Provided By (Used In) Investing Activities	(321)	(365)
CASH FLOWS FROM FINANCING ACTIVITIES
Redemption of Long-Term Debt	0	(66)
Cash Dividend Paid on Common Stock	(250)	(300)
Other	(2)	(7)
Net Cash Provided By (Used In) Financing Activities	(252)	(373)
Net Increase (Decrease) In Cash and Cash Equivalents	(1)	(7)
Cash and Cash Equivalents at Beginning of Period	7	12
Cash and Cash Equivalents at End of Period	6	5
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	2	(2)
Interest Paid, Net of Amounts Capitalized	18	15
Accrued Property, Plant and Equipment Expenditures	41	59
PSE And G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	179	197
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	215	190
Provision for Deferred Income Taxes (Other than Leases) and ITC	29	8
Non-Cash Employee Benefit Plan Costs	39	44
Deferred Storm Costs	(46)	4
Net Change in Regulatory Assets and Liabilities	80	(26)
Cost of Removal	(24)	(20)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	(200)	(14)
Fuel, Materials and Supplies	(7)	(3)
Prepayments	20	52
Accounts Receivable/Payable-Affiliated Companies, net	64	(8)
Other Current Assets and Liabilities	112	51
Employee Benefit Plan Funding and Related Payments	(120)	(103)
Other	(12)	(6)
Net Cash Provided By (Used In) Operating Activities	329	366
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(572)	(435)
Proceeds from Sale of Available-for-Sale Securities	6	51
Investments in Available-for-Sale Securities	(6)	(51)
Solar Loan Investments	(7)	(19)
Restricted Funds	1	0
Net Cash Provided By (Used In) Investing Activities	(578)	(454)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Short-Term Debt	(98)	29
Issuance of Long-Term Debt	400	0
Redemption of Long-Term Debt	(150)	0
Redemption of Securitization Debt	(51)	(49)
Contributed Capital	100	0
Other	(7)	0
Net Cash Provided By (Used In) Financing Activities	194	(20)
Net Increase (Decrease) In Cash and Cash Equivalents	(55)	(108)
Cash and Cash Equivalents at Beginning of Period	116	143
Cash and Cash Equivalents at End of Period	61	35
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	0	(22)
Interest Paid, Net of Amounts Capitalized	63	69
Accrued Property, Plant and Equipment Expenditures	$ 224	$ 143